A deadly cat virus is spreading in Upcountry Maui and officials want you to be on the lookout.

The Maui Humane Society says the virus, known as feline panleukopenia, is highly contagious and can cause vomiting, diarrhea, lethargy, fever and even sudden death within just a few days.

SPCA Maui will hold a mass vaccination clinic for cats this Sunday, June 15, 9-11 a.m., at its new Kahului clinic at 355 Hukilike St. Suite #112. All vaccines are by donation and on a first-come, first-served basis. Cats must be in hard-sided carriers or traps and covered with a clean dry towel.

The virus does not affect humans.

Officials say the best way to protect cats is by vaccinating them. MHS urges all cat owners, particularly kitten owners, to make sure their pets are fully up-to-date on their vaccines.

Experts say cats that survive an infection develop immunity that likely protects them for the rest of their lives.

If you see a sick or dying cat, call the Maui Humane Society at (808) 877-3680.